Robtex

Up: 176.105.240.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 176.105.240.0/23
Down right: 176.105.242.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
176.105.240.10	PTR	mx1.gokop.si
176.105.240.10	PTR	mx1.it-tim.com
176.105.240.10	A	mx1.it-team.global
176.105.240.48	PTR	mail.it-tim.si
176.105.240.48	A+PTR	mail.it-team.global
176.105.240.48	PTR	mail.atup.si